# `next-head-count` is missing #### Why This Error Occurred You have a custom `pages/_document.js` that doesn't have the components required for Next.js to render correctly. #### Possible Ways to Fix It Ensure that your `_document.js` is importing and rendering all of the [required components](https://nextjs.org/docs/advanced-features/custom-document). In this case you are most likely not rendering the `` component imported from `next/document`.